SIST EN 1120:1997
(Main)Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fittings - Determination of the resistance to chemical attack from the inside of a section in a deflected condition
Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fittings - Determination of the resistance to chemical attack from the inside of a section in a deflected condition
This standard specifies a method for determining the chemical resistance properties of glass-reinforced thermosetting plastics (GRP) pipes and fittings in a deflected condition for nominal sizes DN 100 and larger. In conjunction with EN 705 this standard provides a method for evaluating the effect of a chemical environment on the interior of a pipe or fitting after a specified period of time.
Kunststoff-Rohrleitungssysteme - Rohre und Formstücke aus glasfaserverstärkten duroplastischen Kunststoffen (GFK) - Ermittlung der Widerstandsfähigkeit gegen Chemikalieneinwirkung von der Innenseite eines Abschnittes im verformten Zustand
Diese Norm legt ein Verfahren zur Ermittlung der chemischen Widerstandsfähigkeit von Rohren und Formstücken aus glasfaserverstärkten duroplastischen Kunststoffen (GFK) der Nennweiten DN 100 und darüber im verformten Zustand fest. In Verbindung mit EN 705 legt diese Norm ein Verfahren fest, das zur Beurteilung des Einflusses einer Chemikalie auf die innere Oberfläche eines Rohres oder Formstückes nach einer festgelegten Zeit dient.
Systemes de canalisations plastiques - Tubes et raccords en plastique thermodurcissable renforcé de verre (PRV) - Détermination de la résistance a une attaque chimique par l'intérieur d'un tronçon de tube soumis a déflexion
Cette norme spécifie une méthode pour la détermination des propriétés de résistance chimique sous ovalisation de tubes et raccords en plastiques thermodurcissables renforcés de verre de diamètre nominal supérieur ou égal à DN 100. En conjonction avec l'EN 705, cette norme fournit une méthode d'évaluation de l'effet d'un environnement chimique à l'intérieur d'un tube ou d'un raccord après une durée spécifiée.
Cevni sistemi iz polimernih materialov - Cevi in fitingi iz duromernih materialov, ojačenih s steklenimi vlakni (GRP) - Določanje kemične odpornosti iz notranjosti deformiranega odseka
General Information
Overview
EN 1120:1996 is a CEN standard for plastics piping systems that defines a laboratory method to assess the chemical resistance of glass‑reinforced thermosetting plastics (GRP) pipes and fittings when tested in a deflected condition. The procedure applies to nominal sizes DN 100 and larger and is intended to evaluate the effect of an internal chemical environment on the inside surface of a pipe or fitting after a specified exposure period. EN 1120 is typically used in conjunction with EN 705 to provide a complete assessment of internal chemical attack.
Key topics and requirements
- Scope: Tests GRP (glass‑reinforced thermosetting plastics) pipes and fittings for internal chemical attack under deflection for DN ≥ 100.
- Deflected condition: Evaluates performance when the pipe or fitting is under mechanical deformation (deflection), reflecting realistic service stresses.
- Chemical exposure assessment: Measures the effect of specified chemical environments on the interior surface after a defined exposure period.
- Intended use: Supports material qualification, performance verification and compatibility assessment for GRP systems subject to internal corrosive media.
- Standards integration: Designed to be used together with EN 705 for a fuller evaluation of internal chemical resistance.
Note: This summary highlights the standard’s purpose and scope. Specific test parameters, acceptance criteria and detailed procedures are defined within the full EN 1120 document.
Applications
EN 1120 is applicable where GRP piping systems are exposed to potentially aggressive internal fluids and where mechanical loading or installation-induced deflection may influence chemical performance. Typical applications include:
- Industrial process pipelines carrying corrosive liquids
- Wastewater and sewage piping where chemical dosing occurs
- Secondary containment or transfer lines in chemical plants
- Service conditions where pipes are installed with bends, offsets or under load
Who should use EN 1120
- Manufacturers of GRP pipes and fittings validating product chemical resistance
- Testing laboratories performing compliance or qualification tests
- Engineers and specifiers selecting materials for corrosive-service piping systems
- Plant operators and asset owners verifying suitability of GRP systems for specific chemical environments
- Regulatory and conformity assessment bodies evaluating compliance to CEN standards
Related standards
- EN 705 - complements EN 1120 by providing additional methodology for evaluating internal chemical environments.
- National adoptions: e.g., SIST EN 1120:1997 (Slovenian adoption of EN 1120).
Keywords: EN 1120:1996, GRP pipes, glass‑reinforced thermosetting plastics, chemical resistance, deflected condition, DN 100, CEN, EN 705, plastics piping systems.
Frequently Asked Questions
SIST EN 1120:1997 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fittings - Determination of the resistance to chemical attack from the inside of a section in a deflected condition". This standard covers: This standard specifies a method for determining the chemical resistance properties of glass-reinforced thermosetting plastics (GRP) pipes and fittings in a deflected condition for nominal sizes DN 100 and larger. In conjunction with EN 705 this standard provides a method for evaluating the effect of a chemical environment on the interior of a pipe or fitting after a specified period of time.
This standard specifies a method for determining the chemical resistance properties of glass-reinforced thermosetting plastics (GRP) pipes and fittings in a deflected condition for nominal sizes DN 100 and larger. In conjunction with EN 705 this standard provides a method for evaluating the effect of a chemical environment on the interior of a pipe or fitting after a specified period of time.
SIST EN 1120:1997 is classified under the following ICS (International Classification for Standards) categories: 23.040.20 - Plastics pipes; 23.040.45 - Plastics fittings; 83.120 - Reinforced plastics. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 1120:1997 is associated with the following European legislation: EU Directives/Regulations: 93/38/EEC; Standardization Mandates: M/BC/CEN/88/15. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kunststoff-Rohrleitungssysteme - Rohre und Formstücke aus glasfaserverstärkten duroplastischen Kunststoffen (GFK) - Ermittlung der Widerstandsfähigkeit gegen Chemikalieneinwirkung von der Innenseite eines Abschnittes im verformten ZustandSystemes de canalisations plastiques - Tubes et raccords en plastique thermodurcissable renforcé de verre (PRV) - Détermination de la résistance a une attaque chimique par l'intérieur d'un tronçon de tube soumis a déflexionPlastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fitting
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